Well, what is it? A kitchen sponge or a dishcloth? I personally like cloths, but I know many people favor sponges.
Sponges are great for wiping up spills and absorbing liquid and some have a scrubby side that helps clean grime from pots and pans and dishes. But, they also absorb harmful foodborne pathogens along the way. There have been some scientific studies showing the kitchen sponge or dishrag is the germiest thing in most homes and, if not cleaned between uses, can be a prime spot for germ growth.